Hair, Skin & Nails: Evidence-Based Supplement Guide
What works, what does not, and what is dangerous. Reviewed by the Scan Dose Research Team.
6 supplements reviewedPubMed citedDrug interactions checked Clinical Summary
Test deficiencies FIRST: iron (ferritin <30), zinc, vitamin D, thyroid, biotin. Fix deficiency = fix hair loss. Biotin only helps if DEFICIENT (rare). BIOTIN >1,000mcg = FDA DEATH WARNING (false troponin test). Collagen: 20% wrinkle reduction (manufacturer-funded). GLP-1 hair loss = temporary from rapid weight loss.